just don't buy a great deal, a box is usually not a big deal only cause they usually have bigger fish to fry. But like always you do run the risk.
Me personally i like to buy just several carts at a time, rather than a whole box, which is even safer. I mean ****, is a small amount of $$$ (and it isn't that big of a saving if you buy a box rather than buying a few carts at a time) really worth the higher risk? It's a decision you're going to have to make.